As the moon moves out of Earth's shadow, the moon's surface is warmed by sunlight. Which type of heat transfer is this?
A conduction
B convection
C radiation

Explanation:  

Heat energy reaches other planets and satellites of the solar system through the process called radiation.

In this process , the heat energy travels in the form of electromagnetic waves which do not require any material medium . It is so because it is a non mechanical wave . Hence heat energy reaches earth or moon even when there is no material medium between sun and the moon . Other mode of transfer of heat requires medium like solid or liquid or gas to travel from one point to another .

scientific laws are the result of testing theories and proving them to be facts.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west